filters for blood and blood components for laboratory use; testing apparatus for testing filter performance; filters for respiratory masks, not for medical purposes; laboratory filters; dust mask filters; air-gas producing apparatus in laboratories

dust mask filters; filters for respiratory masks, not for medical purposes; testing apparatus for testing filter performance; air-gas producing apparatus in laboratories; filters for blood and blood components for laboratory use; laboratory filters

unit that humidifies and de-humidifies enclosed space and terrestrial environments